Cyntoia Brown was 16 when she shot dead Johnny Mitchell Allen, an estate agent who had picked her up for sex off the streets of Nashville, Tennessee, in August 2004.
She testified that she was repeatedly hit, choked, and dragged, and nearly always had a gun pointing at her.
Brown, who feared that former soldier planned to kill her, eventually grabbed one of Allen's guns and killed him, Fox 17 reports.
Unless the state of Tennessee intervenes on her behalf, Brown will not be eligible for parole until she is 67 years old.
With Brown's story getting spread across social media in recent days, celebrities are showing their support for Brown. "We have to do better & do what's right", Kim Kardashian wrote in her tweet sharing the same picture of the girl.
If you haven't heard about her case, this you must know: Her story is the story of what is wrong with America, with its criminal justice system, and the way it treats its children-its most vulnerable Black girls. She shared an image with the hashtag #FreeCyntoiaBrown, and said she had called her lawyers this week "to see what can be done to fix" Brown's situation.More news: Nigeria police say at least 20 killed in mosque bombing
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This week saw the 2004 trial of sex trafficking victim Cyntoia Brown thrust back into the public's consciousness, after a photo loosely detailing the controversial case went viral.
Less than two hours after the post, Rihanna's comments had garnered almost 700,000 likes.
A documentary filmmaker named Dan Birman has been trying to drum up support for her case for almost a decade, filming a movie about her in order to increase awareness.
He described Ms. Brown as "extremely remorseful", but said she also thinks "it was unjust what had happened in her life, and what a 40-year-old man was doing to her". Now celebrities, including Kim Kardashian and Rihanna, are using their fame to call for Justice for Brown.
Derri Smith, the Founder of End Slavery Tennessee, has stated that, though Brown did indeed kill Allen, she has served her time and deserves a second chance. She hopes to earn a bachelor of arts degree by next year, Mr. Bone said.
While in prison, Cyntoia has mentored other women, and in 2016 gained an Associate's Degree from Lipscomb University's in-jail programme.